Name	Known for
Nerys Hughes Megan Roberts Megan Roberts See fewer	The Liver Birds (1969)
Freddie Jones Dr. Emlyn Isaacs Dr. Emlyn Isaacs See fewer	Dune (1984)
Nicholas Jones Dr. James Isaacs Dr. James Isaacs See fewer	In the Heart of the Sea (2015)
Christine Pollon Dilys Humphries Dilys Humphries See fewer	The Avengers (1961)
Janet Aethwy Ruth Jones Ruth Jones See fewer	Patagonia (2010)
Iris Jones Irene Wynne-Lewis Irene Wynne-Lewis See fewer	Cameleon (1997)
John Franklyn-Robbins Rex Huxtable Rex Huxtable See fewer	Emma (1996)
Lynette Davies Isobel Huxtable Isobel Huxtable See fewer	Miracles Take Longer (1983)
Richard Lynch David Huxtable David Huxtable See fewer	The Hollow Crown (2012)
Owen Garmon R.T. Williams R.T. Williams See fewer	The Proposition (1996)
Jack Walters 'Captain' Mansel 'Captain' Mansel See fewer	The Englishman Who Went Up a Hill But Came Down a Mountain (1995)
Sian Wheldon Elin Elin See fewer	Un nos ola' leuad (1991)